This document summarizes a presentation on pile foundations for a pedestrian metro station. It describes the project details including the client, consultant, contractor and engineer. It provides information on the types of piles used (bored piles), their depth, diameter, number and boring completion time. Machinery used for the project including an auger bucket crane and excavator are highlighted. The steps for pile foundation including geotechnical investigation and design are outlined. Details of the boring, cage installation, concrete quantity and filling process are provided. The purpose of using pile foundations to enhance the soil's CBR and strength and to divert loads to stronger strata is stated.

2. Name: Abdul Majid & Nadir Murtaza
Reg. No: 16-CE-132 & 16-CE-136
Presentation Topic: Pile Foundation

3. Pile Foundation

4. Pile
A pile is a slender column made of wood, concrete or
steel.
A pile is either driven into the soil or formed by
excavating a hole and then filling it with concrete.
The pile transfer the load to soil by friction or by
direct bearing, in the latter case, piles being taken up
to hard strata.

5. Types of pile foundation
 There are two fundamental types of pile foundations(based on structural behavior):
 End bearing piles:
In end bearing piles the bottom end of the pile rests on a layer of specially strong soil
or rock.
 Friction piles:
The pile transfers the load of the building to the soil across the full height of the pile,
by friction.

6. Metro Station
 Client
Capital Development Authority(CDA)
 Consultant
NESPAK
 Contractor
Metro-Cone
 Engineer
Engr Zeeshan Niazi

7. Steps For Pile Foundation
1. Geotechnical Investigation
There are numbers of tests to check the surface for pile:
I. SPT(Standard Penetration Test)
II. Core Penetration Test

8. 2. Pile Design
Pile design depends upon the following:
I. Strata of soil
II. Load apply on pile
III. Depth of pile
IV. Bearing capacity of soil
V. Type of structure

9. Project Pile
Station Name:
Pedestrian Station
Type of Pile:
 Bored Pile:
Bored pilling is a method that involves boring a circular hole into the ground, installing
steel reinforcement and filling the bore hole with concrete to form a pile.
 Depth of Pile:
31 meters
 Diameter of Pile:
1 meter
 Number of layers:
4 layers
 Boring completion time:
3 hours

10. Project Pile
 Cage length
12 meters
 Steel used:
Up to 36 meters
 Number of Piles:
4 piles

11. Machinery Used
 Auger Bucket Crane
 Excavator
 Auger Bucket Crane’s Price:
4 Crore

12. Auger Bucket Crane

13. Excavator

14. Boring
 Boring is drilling a hole, tunnel or well in the earth.
 Wet boring
 Dry boring
In this project the boring is dry.
In this project casing is not required because the strata is hard enough and it is not collapsing
during boring.

15. Boring

16. Cage Installation

17. Quantity Of Concrete
 Quantity of concrete can be calculated by using the formula:
Area=3.14(D)2/4
Volume=Area*length of Pile
Type of concrete:
A2

18. Filling Process
 After installing the steel cage, the Tremie pipe is inserted for pouring concrete.
 3 Types of Tremie
 1 meter
 2 meter
 3 meter

19. Pouring The Concrete

20. Purpose of Pile
 To enhance CBR
 The California bearing ratio (CBR) is a penetration test for evaluation of the mechanical
strength of natural ground, subgrades and base courses beneath new carriageway
construction. It was developed by the California Department of
Transportation before World War II.
 To enhance strength of soil
 To divert the load to the strata
 Length of pile depends upon the strata of soil and load of structure

21. Thank
You!!!